Finding the Fourth Proportional to 21,146.72, 31,717.62 and 5,565.56

Step by Step Solution

1. Step 1: Write the proportion equation
   21,146.72 : 31,717.62 = 5,565.56 : x
2. Step 2: Convert to fraction form
   21,146.72/31,717.62 = 5,565.56/x
3. Step 3: Cross multiply
   21,146.72x = 31,717.62 × 5,565.56
4. Step 4: Simplify right side
   21,146.72x = 176,526,158.58
5. Step 5: Solve for x
   x = 176,526,158.58/21,146.72
6. Step 6: Final answer
   x = 8,347.69